/*
 * Copyright 2015 Austin Keener, Michael Ritter, Florian Spieß, and the JDA contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.dv8tion.jda.internal.entities;

import net.dv8tion.jda.api.Permission;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.entities.ScheduledEvent;
import net.dv8tion.jda.api.entities.User;
import net.dv8tion.jda.api.entities.channel.unions.GuildChannelUnion;
import net.dv8tion.jda.api.exceptions.InsufficientPermissionException;
import net.dv8tion.jda.api.managers.ScheduledEventManager;
import net.dv8tion.jda.api.requests.Route;
import net.dv8tion.jda.api.requests.restaction.AuditableRestAction;
import net.dv8tion.jda.api.requests.restaction.pagination.ScheduledEventMembersPaginationAction;
import net.dv8tion.jda.internal.managers.ScheduledEventManagerImpl;
import net.dv8tion.jda.internal.requests.restaction.AuditableRestActionImpl;
import net.dv8tion.jda.internal.requests.restaction.pagination.ScheduledEventMembersPaginationActionImpl;
import net.dv8tion.jda.internal.utils.Checks;
import net.dv8tion.jda.internal.utils.Helpers;

import java.time.OffsetDateTime;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class ScheduledEventImpl implements ScheduledEvent {
    private final long id;
    private final Guild guild;

    private String name, description;
    private OffsetDateTime startTime, endTime;
    private String image;
    private Status status;
    private Type type;
    private User creator;
    private long creatorId;
    private int interestedUserCount;
    private String location;

    public ScheduledEventImpl(long id, Guild guild) {
        this.id = id;
        this.guild = guild;
    }

    @Nonnull
    @Override
    public String getName() {
        return name;
    }

    @Nullable
    @Override
    public String getDescription() {
        return description;
    }

    @Nullable
    @Override
    public String getImageUrl() {
        return image == null ? null : String.format(IMAGE_URL, getId(), image, image.startsWith("a_") ? "gif" : "png");
    }

    @Nullable
    @Override
    public User getCreator() {
        return creator;
    }

    @Override
    public long getCreatorIdLong() {
        return creatorId;
    }

    @Nonnull
    @Override
    public Status getStatus() {
        return status;
    }

    @Nonnull
    @Override
    public Type getType() {
        return type;
    }

    @Nonnull
    @Override
    public OffsetDateTime getStartTime() {
        return startTime;
    }

    @Nullable
    @Override
    public OffsetDateTime getEndTime() {
        return endTime;
    }

    @Nullable
    @Override
    public GuildChannelUnion getChannel() {
        if (type.isChannel()) {
            return (GuildChannelUnion) guild.getGuildChannelById(location);
        }
        return null;
    }

    @Nonnull
    @Override
    public String getLocation() {
        return location;
    }

    @Nonnull
    @Override
    public String getJumpUrl() {
        return Helpers.format(ScheduledEvent.JUMP_URL, getGuild().getId(), getId());
    }

    @Override
    public int getInterestedUserCount() {
        return interestedUserCount;
    }

    @Nonnull
    @Override
    public Guild getGuild() {
        return guild;
    }

    @Override
    public long getIdLong() {
        return id;
    }

    @Nonnull
    @Override
    public ScheduledEventManager getManager() {
        return new ScheduledEventManagerImpl(this);
    }

    @Nonnull
    @Override
    public AuditableRestAction<Void> delete() {
        Guild guild = getGuild();
        if (!guild.getSelfMember().hasPermission(Permission.MANAGE_EVENTS)) {
            throw new InsufficientPermissionException(guild, Permission.MANAGE_EVENTS);
        }

        Route.CompiledRoute route = Route.Guilds.DELETE_SCHEDULED_EVENT.compile(guild.getId(), getId());
        return new AuditableRestActionImpl<>(getJDA(), route);
    }

    @Nonnull
    @Override
    public ScheduledEventMembersPaginationAction retrieveInterestedMembers() {
        return new ScheduledEventMembersPaginationActionImpl(this);
    }

    public ScheduledEventImpl setName(String name) {
        this.name = name;
        return this;
    }

    public ScheduledEventImpl setType(Type type) {
        this.type = type;
        return this;
    }

    public ScheduledEventImpl setLocation(String location) {
        this.location = location;
        return this;
    }

    public ScheduledEventImpl setDescription(String description) {
        this.description = description;
        return this;
    }

    public ScheduledEventImpl setImage(String image) {
        this.image = image;
        return this;
    }

    public ScheduledEventImpl setCreatorId(long creatorId) {
        this.creatorId = creatorId;
        return this;
    }

    public ScheduledEventImpl setCreator(User creator) {
        this.creator = creator;
        return this;
    }

    public ScheduledEventImpl setStatus(Status status) {
        this.status = status;
        return this;
    }

    public ScheduledEventImpl setStartTime(OffsetDateTime startTime) {
        this.startTime = startTime;
        return this;
    }

    public ScheduledEventImpl setEndTime(OffsetDateTime endTime) {
        this.endTime = endTime;
        return this;
    }

    public ScheduledEventImpl setInterestedUserCount(int interestedUserCount) {
        this.interestedUserCount = interestedUserCount;
        return this;
    }

    @Override
    public int compareTo(@Nonnull ScheduledEvent scheduledEvent) {
        Checks.notNull(scheduledEvent, "Scheduled Event");
        Checks.check(
                this.getGuild().equals(scheduledEvent.getGuild()),
                "Cannot compare two Scheduled Events belonging to seperate guilds!");

        int startTimeComparison =
                OffsetDateTime.timeLineOrder().compare(this.getStartTime(), scheduledEvent.getStartTime());
        if (startTimeComparison == 0) {
            return Long.compare(this.getIdLong(), scheduledEvent.getIdLong());
        } else {
            return startTimeComparison;
        }
    }

    @Override
    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }
        if (!(o instanceof ScheduledEventImpl)) {
            return false;
        }
        return this.id == ((ScheduledEventImpl) o).id;
    }

    @Override
    public int hashCode() {
        return Long.hashCode(id);
    }

    @Override
    public String toString() {
        return "ScheduledEvent:" + getName() + '(' + id + ')';
    }
}
